package com.xian.minetomcat.simpledemo.day2.engine;

import com.xian.minetomcat.simpledemo.day2.connector.HttpExchangeRequest;
import com.xian.minetomcat.simpledemo.day3.ServletContextImpl;
import com.xian.minetomcat.simpledemo.day3.support.HttpHeaders;
import com.xian.minetomcat.simpledemo.day3.support.Parameters;
import com.xian.minetomcat.simpledemo.day3.utils.HttpUtils;
import jakarta.servlet.*;
import jakarta.servlet.http.*;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.Principal;
import java.util.*;

/**
 * @author zhan
 * @version 2024/2/4
 */
public class HttpServletRequestImpl implements HttpServletRequest {

    final HttpExchangeRequest exchangeRequest;
    ServletContextImpl servletContext;
    HttpServletResponse response;

    HttpHeaders headers;

    Parameters parameters;

    public HttpServletRequestImpl(HttpExchangeRequest exchangeRequest) {
        this.exchangeRequest = exchangeRequest;
    }

    public HttpServletRequestImpl(HttpExchangeRequest exchangeRequest, HttpServletResponse response, ServletContextImpl servletContext) {
        this.exchangeRequest = exchangeRequest;
        this.response = response;
        this.servletContext = servletContext;
        this.headers = new HttpHeaders(exchangeRequest.getRequestHeaders());
        this.parameters = new Parameters(exchangeRequest, "UTF-8");
    }

    @Override
    public String getParameter(String name) {
        return this.parameters.getParameter(name);
    }

    @Override
    public Enumeration<String> getParameterNames() {
        return this.parameters.getParameterNames();
    }

    @Override
    public String[] getParameterValues(String name) {
        return this.parameters.getParameterValues(name);
    }

    @Override
    public Map<String, String[]> getParameterMap() {
        return this.parameters.getParameterMap();
    }

    @Override
    public HttpSession getSession(boolean create) {
        String sessionId = null;
        Cookie[] cookies = getCookies();
        if (cookies != null) {
            for (Cookie cookie : cookies) {
                if ("JSESSIONID".equals(cookie.getName())) {
                    sessionId = cookie.getValue();
                    break;
                }
            }
        }

        if (sessionId == null && !create) {
            return null;
        }

        if (sessionId == null) {
            if (this.response.isCommitted()) {
                throw new IllegalStateException("Cannot create session for response is commited.");
            }
            sessionId = UUID.randomUUID().toString();

            String cookieValue = "JSESSIONID=" + sessionId + "; Path=/; SameSite=Strict; HttpOnly";
            this.response.addHeader("Set-Cookie", cookieValue);
        }

        // instant session or form cache
        return this.servletContext.sessionManager.getSession(sessionId);
    }

    @Override
    public HttpSession getSession() {
        return getSession(true);
    }

    @Override
    public String changeSessionId() {
        throw new UnsupportedOperationException("changeSessionId() is not supported.");
    }

    @Override
    public Cookie[] getCookies() {
        String cookieValue = this.headers.getHeader("Cookie");
        return HttpUtils.parseCookies(cookieValue);
    }

    @Override
    public String getMethod() {
        return this.exchangeRequest.getRequestMethod();
    }

    @Override
    public String getAuthType() {
        return null;
    }

    @Override
    public long getDateHeader(String s) {
        return 0;
    }

    @Override
    public String getHeader(String s) {
        return null;
    }

    @Override
    public Enumeration<String> getHeaders(String s) {
        return null;
    }

    @Override
    public Enumeration<String> getHeaderNames() {
        return null;
    }

    @Override
    public int getIntHeader(String s) {
        return 0;
    }

    @Override
    public String getPathInfo() {
        return null;
    }

    @Override
    public String getPathTranslated() {
        return null;
    }

    @Override
    public String getContextPath() {
        return null;
    }

    @Override
    public String getQueryString() {
        return null;
    }

    @Override
    public String getRemoteUser() {
        return null;
    }

    @Override
    public boolean isUserInRole(String s) {
        return false;
    }

    @Override
    public Principal getUserPrincipal() {
        return null;
    }

    @Override
    public String getRequestedSessionId() {
        return null;
    }

    @Override
    public String getRequestURI() {
        return this.exchangeRequest.getRequestURI().getPath();
    }

    @Override
    public StringBuffer getRequestURL() {
        return null;
    }

    @Override
    public String getServletPath() {
        return null;
    }

    @Override
    public boolean isRequestedSessionIdValid() {
        return false;
    }

    @Override
    public boolean isRequestedSessionIdFromCookie() {
        return false;
    }

    @Override
    public boolean isRequestedSessionIdFromURL() {
        return false;
    }

    @Override
    public boolean authenticate(HttpServletResponse httpServletResponse) throws IOException, ServletException {
        return false;
    }

    @Override
    public void login(String s, String s1) throws ServletException {

    }

    @Override
    public void logout() throws ServletException {

    }

    @Override
    public Collection<Part> getParts() throws IOException, ServletException {
        return null;
    }

    @Override
    public Part getPart(String s) throws IOException, ServletException {
        return null;
    }

    @Override
    public <T extends HttpUpgradeHandler> T upgrade(Class<T> aClass) throws IOException, ServletException {
        return null;
    }

    @Override
    public Object getAttribute(String s) {
        return null;
    }

    @Override
    public Enumeration<String> getAttributeNames() {
        return null;
    }

    @Override
    public String getCharacterEncoding() {
        return null;
    }

    @Override
    public void setCharacterEncoding(String s) throws UnsupportedEncodingException {

    }

    @Override
    public int getContentLength() {
        return 0;
    }

    @Override
    public long getContentLengthLong() {
        return 0;
    }

    @Override
    public String getContentType() {
        return null;
    }

    @Override
    public ServletInputStream getInputStream() throws IOException {
        return null;
    }


    @Override
    public String getProtocol() {
        return null;
    }

    @Override
    public String getScheme() {
        return null;
    }

    @Override
    public String getServerName() {
        return null;
    }

    @Override
    public int getServerPort() {
        return 0;
    }

    @Override
    public BufferedReader getReader() throws IOException {
        return null;
    }

    @Override
    public String getRemoteAddr() {
        return null;
    }

    @Override
    public String getRemoteHost() {
        return null;
    }

    @Override
    public void setAttribute(String s, Object o) {

    }

    @Override
    public void removeAttribute(String s) {

    }

    @Override
    public Locale getLocale() {
        return null;
    }

    @Override
    public Enumeration<Locale> getLocales() {
        return null;
    }

    @Override
    public boolean isSecure() {
        return false;
    }

    @Override
    public RequestDispatcher getRequestDispatcher(String s) {
        return null;
    }

    @Override
    public int getRemotePort() {
        return 0;
    }

    @Override
    public String getLocalName() {
        return null;
    }

    @Override
    public String getLocalAddr() {
        return null;
    }

    @Override
    public int getLocalPort() {
        return 0;
    }

    @Override
    public ServletContext getServletContext() {
        return null;
    }

    @Override
    public AsyncContext startAsync() throws IllegalStateException {
        return null;
    }

    @Override
    public AsyncContext startAsync(ServletRequest servletRequest, ServletResponse servletResponse) throws IllegalStateException {
        return null;
    }

    @Override
    public boolean isAsyncStarted() {
        return false;
    }

    @Override
    public boolean isAsyncSupported() {
        return false;
    }

    @Override
    public AsyncContext getAsyncContext() {
        return null;
    }

    @Override
    public DispatcherType getDispatcherType() {
        return null;
    }

    @Override
    public String getRequestId() {
        return null;
    }

    @Override
    public String getProtocolRequestId() {
        return null;
    }

    @Override
    public ServletConnection getServletConnection() {
        return null;
    }
}
